Liked it a lot. I consider it the best of the three, so far, but it's a hard call to make. I enjoyed the first movie much more when I rewatched it on DVD than I did in the theater. I think the second one is better than the first...but I think this one holds together on it's own better than the other two.
Cuaron and Klowes cut a lot of material, but kept the core intact. There are lots of little things I would have liked to have seen added in, but the movie already went to 2 hours and 21 minutes, and I'm sure that Cuaron had to make tough choices. Things like identifiying the four partners in crime, for example, would have required a great deal more background to not feel superflous and confusing, I think. I fully expect that we'll get all that material summed up tidily in the next movie, instead, combined with the material on Snape, as well.
With all of the characters, side-plots and continuing sequences, things have to drop to the floor. That's what the DVDs can really adress, later. Everyone's going to have their favorite moments or items that were missed...that's just the danger of having to do such an adaption.
Mike Newell, the fellow chosen to do the fourth film,
isn't exactly a piker, either.